3. Definition of multi-pin plug-in unit terminal
1. Prompt:
R- red Bl- blue Y - yellow B- black P- pink G- green W- white
O- orange Gr - gray Br- brown V- purple Lg- olive drab
The first letter indicates primary color
The second letter indicates stripe colorTerminal
number1 MIL C 10 NA
2 Engine oil pressure switch YG 1 P
3 Brake fluid GR 2 R
4 Park G 3 N
5 Right turn light GB 4 D
6NA 52
7 EBD 6 L
8 Charge WR 7
9NA 8NA
10 NA 9 Sidelight GW
11 Safety belt YR 10 Start BR
12 NA 11 B+
13 Engine GY 12IG ( + ) Y
14 Safety gasbag RY 13 GND
15 NA 14 NA
16 IG ( + ) 15Speed sensor earthing B
1 NA 16 Speed signal input YR
2 Left turn light GW 17 Speed sensor power supply RY
3 High beam (+) RB 18 Key (ODO/TRIP) G
4 High beam (-) RW 19 Key (adjust brightness) YG
5 Foglight Gr 20 Key COM B
6 Rear defrost YB 21 Fuel gauge V
7 NA 22 ABS R
8 NA 23 Tachometer BBL
9 Door-lock warning lamp RBL 24 Coolant temperature gauge YWA
BCCombination Instrument System -Wiring diagram of Combination Instrument and Location of Multi-pin Plug-in Terminal5-9Definition of terminalConductor
ColorTerminal
numberDefinition of terminalConductor
Color
c.Check voltage between terminals
Standard:Rotating wheel 7.5-9V
Below 0.5V0Voltage changes alternativelyCombination Instrument System -Malfunction Symptom Table and Troubleshooting5-11 Result and measures:
Normal, replace combination instrument assy.
Abnormal, repair or replace wiring harness or connector
2. Speedometer fails
Check
(1) Check combination instrument assy.
a. Remove combination instrument assy. , keep connection of connector.
b. Check on state
Check connection between terminals
Standard:Tester connection Conditions Standard condition
C 17- ground Turn ignition switch to ON position 7. 5-9V
Result and measures:
Abnormal, go to (2) Check combination instrument assy. speed input signal
Normal, go to (3) Check combination instrument assy.
(2) Check combination instrument assy. speed input signal
a. Check voltage
Prop up two front wheels
Push transmission lever to neutral position
Turn on ignition switch
turn front wheel slowly, measure the voltage between terminal C15 and terminal C16
Standard voltage is shown in the figure below:
Result and measures:
Normal, replace combination instrument assy.
Abnormal, check speed sensorTester connection Condition Standard condition
C 15-ground Normal ON
Check voltage between terminals
Standard:7.5-9V
0Voltage changes alternatively5-12 b. Check speed sensor
Check on state
Check connection between terminals
Standard:Tester connection Conditions Standard condition
3- ground Turn ignition switch to ON position 7. 5-9VTester connection Condition Standard condition
2- ground Normal ON Result and measures:
Abnormal, repair or replace wiring harness or connector
Normal, check speed sensor output signal
c. Check speed sensor output signal
Check voltage
Prop up two front wheels
Push transmission lever to neutral position
Turn on ignition switch
Turn front wheel slowly, measure the voltage between terminal 1 and terminal 2
Standard voltage is shown in the figure below:
Rotating wheel Below 0.5V
Result and measures:
Normal, repair or replace wiring harness or connector
Abnormal, replace speed sensor
(3) Check combination instrument assy.
a. Remove combination instrument assy. , disconnect connector.
b. Check on status
Check connection between terminals
Standard:
Tester connection Condition Standard condition
C 13- ground Normal ONCombination Instrument System -Malfunction Symptom Table and Troubleshooting
5-13 c. Check voltage between terminals
Standard:Tester connectionConditions Standard condition
C 12- ground Turn ignition switch to ON position 7. 5-9V
Result and measures:
Abnormal, repair or replace wiring harness or connector
Normal, replace combination instrument assy.
3. Tachometer fails
Checkout procedure
(1) Check combination instrument assy. rotating speed input
signal
a. Remove combination instrument assy. , keep connection of
connector.
b. Connect oscillograph to terminal C23 and ground.
c. Start up engine
d. Check signal waveform
Standard:
Display correct waveform
Result and measures:
Normal, check and replace combination instrument assy.
Abnormal, check engine ECU rotating speed output signal
(2) Check engine ECU rotating speed output signal
a. Remove engine ECU ware, keep connection of connector.
b. Connect oscillograph to terminal ECU 8# pin and ground.
c. Start up engine
d. Check signal waveform
Standard:
Display correct waveform
Result and measures:
Normal, repair or replace wiring harness or connector
Abnormal, check revolution speed transducer and engine
control system
4. Water thermometer fails
Circuit diagramCombination Instrument System -Malfunction Symptom Table and Troubleshooting combination instrument assy
combination instrument assy engine ECU
coolant Temperature SensorEngine Speed Signal
coolant Temperature Signal
Tester connection Conditions Standard state
C(60°C)164.5±5 ohm
C 24- ground 1/2C(90°C)56±3 ohm
H(115°C)28.7±2 ohmConditions Standard state
C(60°C)164.5±5 ohm
1/2C(90°C)56±3 ohm
H(115°C)28.7±2 ohm5-14 (1) Use diagnostic instrument to read engine water temperature value
a. Connect diagnostic instrument to diagnostic interface
b. Turn on ignition switch
c. Read water temperature value displayed on diagnostic instrument
Standard: the same as actual engine cooling water temperature
Result and measures:
Normal, water thermometer does not fail
Abnormal, check combination instrument assy.
(2) Check combination instrument assy.
a. Check resistance
Remove combination instrument assy. , disconnect connector.
Check connection between terminals
Standard:
Result and measures:
Normal, replace combination instrument assy.
Abnormal, check water temperature sensor
b. Check water temperature sensor
Remove water temperature sensor and put it in thermostat.
Adjust temperature of thermostat and measure resistance value of water temperature sensor
Standard:
Result and measures:
Normal, repair or replace wiring harness and connector
Abnormal, replace water temperature sensor
5. Fuel gauge fails
Circuit diagramCombination Instrument System -Malfunction Symptom Table and Troubleshooting combination instrument assy
Fuel Sensor
Fuel Signal
Tester connectionConditions Standard state
E 110±6 ohm
C 21- ground 1/232.5±3 ohm
F 3±2 ohmConditions Standard state5-15 (1) Check combination instrument assy.
a. Check resistance
Remove combination instrument assy. , disconnect connector.
Check connection between terminals
Standard:
Result and measures:
Normal, replace combination instrument assy.
Abnormal, check fuel sensor
b. Check fuel sensor
Remove fuel sensor.
Adjust the height of fuel sensor and measure its resistance value.
Standard:
Result and measures:
Normal, repair or replace wiring harness and connector
Abnormal, replace fuel sensor
6. Odometer fails
Firstly check according to speedometer problem, if speedometer is normal, odometer fails, replace combina-
tion instrument assy.
7. Illuminating lamp fails
Symptom
All illuminating lamps do not illuminate
Only one illuminating lamp does not illuminateSuspected area
1. Brightness control switch
2. Wiring harness or connector
3. Combination instrument
1. Combination instrument assy.Combination Instrument System -Malfunction Symptom Table and Troubleshooting C(60°C)164.5±5 ohm
1/2C(90°C)56±3 ohm
H(115°C)28.7±2 ohm
Suspected area
1. Wiring harness or connector
2. ECM
3. Combination instrument assy.
1. Wiring harness or connector
2. Alternator
3. Combination instrument assy.
1. Wiring harness or connector
2. Manual brake switch
3. Combination instrument assy.
1. Wiring harness or connector
2. Brake fluid level switch
3. Combination instrument assy.
1. Wiring harness or connector
2. ABS ECU or ABS warning lamp driving module
3. Combination instrument assy.
1. Wiring harness or connector
2. Airbag ECU controller
3. Combination instrument assy.
1. Wiring harness or connector
2. Airbag ECU controller
3. Combination instrument assy.
1. Wiring harness or connector
2. Front head light dimmer switch
3. Combination instrument assy.
1. Wiring harness or connector
2. Front head light dimmer switch
3. Combination instrument assy.
1. Wiring harness or connector
2. Rear defrost switch
3. Combination instrument assy. 8. Warning lamp fails
Symptom
Check that engine warning lamp does not
illuminate
Charge warning lamp does not illuminate
Park braking warning lamp does not
illuminate
Brake failure warning lamp does not
illuminate
ABS warning lamp does not illuminate
SRS warning lamp does not illuminate
Passenger's airbag indicator lamp does
not illuminate
High beam indicator lamp does not
illuminate
Rear foglight indicator lamp does not
illuminate
Rear defrost indicator lamp does not
illuminate5-16Combination Instrument System -Malfunction Symptom Table and Troubleshooting
5-17Suspected area
1. Harness or connector.
2. Front fog switch
3. Combination instrument assy.
1. Wiring harness or connector
2. Cuolant temperature sensor
3. Combination instrument assy.
1. Wiring harness or connector
2. Safety belt buckle switch
3. Combination instrument assy. Symptom
Front fog switch lamp does not illuminate
Water temperature warning indicator lamp
does not illuminate
Safety belt warning indicator lamp does
not illuminateCombination Instrument System -Malfunction Symptom Table and Troubleshooting